RM-4339 Calibration Procedure
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© National Instruments
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5
Initial Setup
Refer to the
NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications
for
information about how to install the software and hardware, and how to configure the device in
Measurement & Automation Explorer (MAX).
Note
When a device is configured with MAX, it is assigned a device identifier.
Each function call uses this identifier to determine which DAQ device to verify,
or verify and adjust. In this document, Dev1 was used for inputs that required a
device identifier.
Verification
The following performance verification procedures describe the sequence of operation and
provides test points required to verify the RM-4339. The verification procedures assume that
adequate traceable uncertainties are available for the calibration references.
SCA Shunt Calibration Resistance Accuracy Verification
This section provides instructions for verifying the RM-4339 SCA shunt calibration resistance
accuracy. Throughout the shunt calibration resistance accuracy verification, use Table 3 to
determine if the RM-4339 is operating within its specified range.
Complete the following steps to test the accuracy of the RM-4339 SCA shunt calibration
resistances:
1.
Plug an RJ50 cable into the RM-4339s RJ50 connector of the channel you want to
verify.
Connect SCA (pin 1) of the RJ50 cable to the DMM HI input and connect SCA
(pin 10) of the RJ50 cable to the DMM LO input as shown in Figure 1
.
Figure 1.
RJ50 to DMM Connections
2.
Configure the DMM for a 2-wire resistance measurement.
DMM
RJ50 Connector
on the RM-4
33
9
HI
LO
S
CA (pin1)
S
CA (pin 10)
Ω
Inp
u
t
